JPH09317183A - Construction method of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the construction period and cost, by constructing the uppermost floor beam of a RC building with a steel frame structure and assembling it on the ground while supporting it by temporary supports and alternately hoisting every half number of the temporary supports by a winch and repeating executing processes of final columns, beams, and floor slabs on the construction site. SOLUTION: The uppermost floor of a RC building is made of a steel structure. Steel beams 1 and temporary supports 2 are assembled on the ground in advance. A winch 3 is installed on the steel beam 1 and the temporary supports are alternately hoisted in every other support. And final columns 4 are erected at the site from which the temporary supports 2 are hoisted and the temporary supports are put down on the final columns 4. After the supports have been put down, beams and floor slabs 5 are executed and the temporary supports 2 are supported by the column- reinforcements 6 of the final columns 4. Then, in a state that the temporary supports 2 are supported by the column-reinforcements 6 or after these have been lowered down to the top end of the beam-floor slab concrete, the uppermost floor steel frame beam 1 is hoisted up to a specified position by the winch 3. These processes are repeated and the construction is executed to the upper floors in turn, in accordance with the progress of the construction of the building body.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a reinforced concrete structure (hereinafter referred to as RC structure) and a steel reinforced concrete structure (hereinafter referred to as SRC structure), which is composed of columns, beams, walls and floor slabs, or a structure thereof. The present invention relates to a method for constructing a mixed structure building.

[0002]

2. Description of the Related Art Conventional RC buildings are rarely constructed using overhead traveling cranes, and when used, a temporary mounting frame is assembled and disassembled after the work is completed. Had adopted. Further, in a conventional RC building, as a method of supporting the frame, a method of installing a large-scale temporary support pillar on the outer periphery of the building, a method of assembling a temporary scaffold and installing the temporary support pillar thereon, A temporary support column with a temporary opening is raised, and the method is used to close the opening after the work is completed, and a special device such as a screw method or a cylinder method is used to elevate and lower the steel frame member.

[0003]

In the construction of the conventional RC building, since a temporary frame is used,
Assembly work at the start of work and dismantling work at the end of work have occurred. Especially when dismantling work requires a large machine,
It is easily affected by site conditions and building conditions. In addition, it is necessary to reinforce external scaffolds, install temporary openings, reinforce floor slabs, and increase the required size of the frame itself. Wastes time and effort.

The present invention has been proposed in view of the above problems of the prior art, and its purpose is to eliminate the need for large-scale temporary support columns, special reinforcement, provision of temporary openings, and reinforcement of floor slabs. At the same time, it is a point to provide a method for constructing a building in which a steel frame member is economically moved up and down by using a commercially available machine.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a reinforced concrete structure, or a steel frame reinforced concrete structure, at least one floor or more of the columns or beams from the top floor of the building to at least one floor or less. Is a steel-framed reinforced concrete structure, using the steel frame of the pillar beam as an upper frame, and using it as an installation frame when performing a building frame work using an overhead traveling crane or manipulator. Depending on the progress of the construction of the frame, it will be gradually elevated to the upper part.

According to a second aspect of the present invention, the steel frame member is supported by column rebars, and the upper frame is supported by the column rebars. According to the invention of claim 3, the steel frame member is moved up and down by using an electric chain block or an electric winch.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the most preferred embodiments of the present invention shown in the drawings. 1 and 2 show the outline of the present invention, in which the top floor of the main building of the building is used as a temporary roof, and the steel beam 1 of the top floor at the ground level 1
Then, the temporary support columns 2 are used to assemble and construct in advance, and ascending as the construction progresses, a manipulator M for construction is attached under the roof. The temporary support column 2 and the steel beam 1
Both are used as temporary roofs, but in the end,
It is used as it is as a pillar, beam or part of it.

Even if the uppermost floor is a steel frame structure including the penthouse PH (see FIG. 13), the uppermost floor of the RC or SRC frame is composed of a two-layer steel frame structure composed of steel columns and beams. The two layers may be moved up and down as one body, or the upper and lower portions may be slidable. In the figure, q is a temporary roof (see FIG. 15). In addition, FIG. 14 shows a case where the top floors other than the top floor of the standard floor are the top floors, and the skeleton blocks are arranged in parallel and the blocks are raised while leaving blocks A and B. Below the fifth floor, the block ABCBA is integrated, Raising AB on each floor, ABCBA is integrated on the 5th floor and below, BCB is integrated on the 6th floor, and only C on the 7th floor.

The structure of the top floor or up to about two layers is R
The C structure is changed to the SRC structure or S structure having a steel frame member, and the steel beam 1 of the temporary roof made of the steel frame on the uppermost floor is supported by the temporary support columns 2 made of steel frames arranged at predetermined intervals. (See FIG. 2 (a)) Next, the temporary columns 2 are raised by every other via the winch 3 on the steel beam 1, and the columns 4 are installed in the space where the temporary columns 2 have been raised. To do. (Refer to Fig. 2 (b)) The temporary support pillar of the temporary roof made of steel on the top floor and the steel beam are not integrated, but the temporary support pillar suspends and supports the steel beam portion through the winch during the construction period. By adopting the structure, and the suspension support structure as described above, the roof lifting device is simplified.

Next, the temporary support columns 2 are hung on the columns 4 constructed as described above, and the other temporary support columns 2 are raised,
The pillar 4 of that part is constructed. (See FIG. 2C.) As described above, the raising of the temporary support columns 2 alternately raises half of the entire temporary support columns 2 by half.
Since it is originally used as a main pillar or a part thereof, its number and position are basically the same as those of the lower main pillar 4, and the lower main pillar of the raised temporary pillar group 2 is While building 4, the other column group supports the temporary roof. However, if you can increase the span of the same column,
It is possible to reduce the number of columns without making all the main columns into steel frames.

After the temporary support columns 2 are lowered onto the main support columns 4 thus constructed, the beam / floor slab 5 is constructed.
(See FIG. 2D) At this time, before lowering the support column 2,
The beam rebar may be attached first. Then beams, walls,
Floor slab concrete is cast, and each temporary support pillar 2 is supported by the pillar reinforcing bars 6 of each main installation pillar 4 below it to support the roof load. (See FIG. 2 (E)) As described above, the temporary support columns 2 are easily supported by supporting the temporary support columns 2 by the column reinforcing bars 6 of the main installation columns 4 themselves.

Next, after the temporary support columns 2 are supported by the column rebars 6 or descend to the beam floor slab concrete top 7, a winch 3 is used to make the top steel beam 1
Pull the (roof) up to the specified position. (See FIG. 2F.) In the above embodiment, an inexpensive elevator roof can be constructed by laying deck plates, sheets, and plate materials on the frame.

Next, the steps of the construction method will be described. (A) In FIG. 3, the working space h between the temporary roof and the floor F is set high in order to suspend the outer shell PC column 2 ', so the roof R is raised before the temporary columns are raised. Column rebar 2a in the column 2
An outer shell PC column 2b having a rectangular tube shape is fitted to the front assembly of the group, and a column concrete C is placed on the outer shell PC column 2b by a bucket or the like to construct an RC column. In this case, most of the lower permanent pillar reinforcements that support the temporary support pillars 2 and the connection points of the main reinforcements support the temporary support pillars 2 with the concrete pillars 2c driven therein, so that reinforcement against buckling is reduced. .

In addition, a groove type outer shell PC beam or a half PC is used between the columns.
The beam is temporarily installed and concrete is poured. As is apparent from the figure, the pillar / beam outer shell PC preceding mounting portion and the pillar / beam outer shell PC trailing mounting portion are alternately arranged. In the figure, 2 ″ is a half-PC plate that is erected on the beam. Floor reinforcement is provided on the plate, facility piping is installed, column rebars 6 are attached, and beam floor concrete 8 is placed.

(B) As shown in FIG. 4, the driving form 9 is arranged so as to sandwich the columns, and concrete is pumped into the columns to construct the columns. The temporary roof R is pulled up after the beam form 10 is attached and the temporary support columns 2 are lifted up without requiring much space. In this case, the temporary columns are short and lightweight, the stability at the time of ascending is improved, and the temporary columns do not become an obstacle when the column reinforcing bars are built.

On the other hand, as compared with (A), it is necessary to reinforce the column rebar of the main column 4 which supports the temporary column. This reinforcing method is shown in FIGS. In the embodiment shown in FIG. 6, the plate-shaped reinforcing member 21 is joined between the main pillar bars 20 in both XY directions by the reinforcing means 30 such as welding.
0'is a stirrup. FIG. 7 shows another reinforcing means, (a)
(B) shows a case where an octagonal link 20 ″ inscribed in the rectangular stirrups 11 surrounding the column main bars arranged at the apexes of the quadrangle is arranged. The case where the sub-zonal muscles 11a are arranged in a lattice in the muscle 11 is shown (e).
(H) and (G) show a case where the reinforcing member 22 is arranged in parallel with the stirrups 11 so as to sandwich the column of main pillars.

(C) FIG. 5 shows a construction example of the present invention, in which the concrete of a column and the concrete of a slab like a beam are simultaneously cast to improve the integrity of the structure. On the other hand, the temporary support columns 2 become long, and reinforcement of the reinforcing bars is required as in (B). Next, as a method of raising and lowering the temporary support column and the roof, a method of using a screw jack, a method of using a winch and a wire, a chain block, and a method of using a hydraulic jack can be considered.

The present invention is characterized by a method of using a winch, a wire, and a chain block. In FIG. 9, the roof is supported from the temporary columns by the electric chain block 102, and the deck plate 103 is covered. After pulling up the beam 104 with the electric chain block 102, the wire 1 is moved by the winch 105 on the beam 104.
The temporary support column is pulled up via 06. 1 in the figure
Reference numeral 07 is a chain, 108 is a sheave, 109 is a guide roller, and 110 is an anchor.

As described above, according to this method, the versatility of the construction method is improved by using the common equipment such as winches, wires, and chain blocks. Furthermore, since the temporary columns are pulled up by using the wires, the work of raising the columns is performed. In the above, there is no device other than the wire around the pillar, and the lifting device does not interfere with the reinforcing bars around the pillar or the formwork work, and the pillar can be smoothly raised.

Reference numeral 111 in the drawing denotes a guide portion. FIG. 10 shows an embodiment using a screw jack system, in which two sets or two sets of screw jacks 200 are mounted on the stigmas of the temporary support columns 2 or the like, and screw rods 201 that are raised and lowered by the jacks are provided on each roof. The roof R is pivotally supported by the R beam 202 to move up and down the roof R by the screw jack 200. 203 is a deck plate. The screw jack method is inexpensive and has a proven track record of control methods, and has the advantage of high safety in the event of a power failure, but when the temporary support pillar 2 is moved up and down, high work at the stigmas occurs, and the weight of the temporary support pillar top is large. However, there is a problem such as imbalance. In this respect, if the manipulator is used to raise the temporary support, the screw jack need only be one floor long, and the length of the temporary support is unnecessary. Therefore, it is possible to make the upper part smaller.

In the electric chain block system, the electric chain blocks are arranged at various places to raise the roof, and the work procedure at the time of ascending and descending is simple, but on the other hand, since a large lifting capacity is required, Custom products may be required. Next, in the hydraulic cylinder system, as shown in FIG. 11, a device in which locking hydraulic cylinders 300A and 300B are combined with a lifting hydraulic cylinder 303A is integrated with the steel beam 302 and is installed at various places.
It is attached to the temporary support pillar 2 via the roof to raise the roof R of the temporary support pillar 2, and the work procedure at the time of ascending and descending is simple, the work on the roof floor can be omitted, and the automatic adaptability to ascend and descend is high. Although there is an advantage, there is a problem that the method of fixing to the temporary support column 2 needs to be examined, as compared with the winch, wire, and chain block systems, and a custom-made product becomes expensive. In the figure, 3
Reference numeral 01 is a guide, 302 is a beam, and 303 is a bearing.

In FIG. 11B, the upper and lower cylinders 300A and 300B are for locking and are used alternately or simultaneously. FIG. 12 is a view of the steel member.
An example of the supporting method by the column reinforcing bar 6 as shown in (e) is shown, and the supporting means of the steel frame beam 1 using the screw reinforcing bar as the column reinforcing bar 6 is shown, and the threaded portion of the column reinforcing bar 6 is penetrated into one groove type supporting member 400. The lock nut 401 is inserted and screwed and supported, and a steel material is supported thereon.

The horizontal force applied to the main roof is supported by the reinforcing bars of the main RC columns, but the horizontal force may be borne by reinforcing the main pillar reinforcing bars. In addition, it may be supported on an external scaffold of a building rising from below, or may be supported via an outer scaffold supported by a lower steel beam. Alternatively, it may be supported by pulling it from the upper frame with a wire or the like, and the wire may be stretched in response to the rise of the main roof.

[0024]

As described above, according to the present invention, the beam on the uppermost floor of the RC building is made of steel, and the steel beam is installed at the ground level together with the temporary support pillars, and the construction work of the building such as an overhead traveling crane is performed. By making it a mounting frame when performing
The frame can be provided economically. In addition, an inexpensive elevator roof can be constructed by laying deck blades on the frame, and the top floor of the main construction is used as a temporary frame. Since the steel pole temporary support pillars and beams are used as they are as the main installation pillar beam or a part thereof, the dismantling work is reduced, and in order to install the temporary pillar on the main installation pillar,
It is possible to effectively use the work space without the need for a temporary space.

Furthermore, by suspending a simple scaffold on the outer periphery of the frame, it is possible to realize a non-scaffolding method without being restricted by conditions such as building location conditions and external shape.
The construction cost is reduced, the construction period is shortened, and the safety is improved in combination with the conventional structure in which the temporary opening is not provided inside the structure. Furthermore, in the case of a high-rise building, a large-sized tower crane can be omitted by equipping the rooftop with a crane installed on the roof, thus reducing the construction cost.

[Brief description of drawings]

FIG. 1 is an elevational view showing a lifting device for a frame on the top floor.

2 (a), (b), (c), (d), (e), and (f) are process charts showing a roof rising method.

FIG. 3 is a conceptual diagram showing an example of a construction method of the present invention.

FIG. 4 is a conceptual diagram showing another example of the construction method of the present invention.

FIG. 5 is a conceptual diagram showing still another example of the construction method of the present invention.

FIG. 6 is a perspective view showing an example of a reinforcing structure for a column main bar.

7 (a), (b), (c), (d), (e), and (f) show examples of the column reinforcing structure, (a), (c), and (e) are plan views thereof, and (b) ( D) (F) is an elevation view.

FIG. 8 is a plan view showing an example of a lifting structure of a temporary frame for attachment.

FIG. 9 is an elevation view of FIG. 8;

FIG. 10 is an elevational view showing another example of the temporary frame for attachment.

11 (a), (b), and (c) are a plan view showing another example of a temporary frame for attachment, an elevation view, and a plan view of a guide portion.

12 (a) and (b) are a plan view and an elevation view showing a support structure of a steel frame member by a column reinforcing bar.

FIG. 13 is a conceptual diagram showing the top floor of the building, showing the case where the penthouse is included in the top floor as a steel structure.

FIG. 14 shows a case where the building other than the top floor is the top floor, and (a), (b), and (c) show the construction process, and the shaded area in the figure is the portion where the pillars and beams are changed to steel frames. .

FIG. 15 shows a case where an uppermost floor composed of two layers of steel frames is formed on the top of the RC or SRC structure.

[Explanation of symbols]

 1 Steel beam on the top floor 2 Temporary column 2'Outer shell PC column 2a Column rebar 2b Outer shell PC column 2c Column concrete 2 ″ Half PC beam 3 Winch 4 Construction column 5 Beam floor slab 6 Column rebar 7 Stile concrete slab concrete ceiling 8 Beam Floor Concrete 9 Driving Formwork 10 Beam Formwork 10 'Half PC Floor Slab 11 Girder Bar 11' Sub Girder 20 Column Main Bar 20 'Girder Bar 21 Plate Reinforcement Member 22 Plate Reinforcement Member 30 Reinforcement Joining Means 101 Column 102 electric chain block 103 deck plate 104 beam 105 winch 106 wire 107 chain 108 sheave 109 guide roller 110 anchor 111 guide part 200 screw jack 201 screw rod 202 beam 203 deck plate 300A hydraulic cylinder for locking 300B hydraulic cylinder for locking 301 guide 302 beam 03 bearing 400 support member 401 lock nut M manipulator R roof T work floor

Front page continued (72) Inventor Yasuo Ishikawa 47-3 Mita, Atsugi City, Kanagawa Prefecture Central Technology Research Institute, Sato Industrial Co., Ltd. (72) Inventor ▲ Yoshi ▼ Yutaka Nada 1200 Manda, Hiratsuka-shi, Kanagawa Komatsu Ltd. Central Inside the laboratory (72) Inventor Kunihiko Arai 12-12-1, Tsurumi Chuo, Tsurumi-ku, Yokohama-shi, Kanagawa Chiyoda Kakoh Construction Co., Ltd.

Claims (3)

[Claims] 1. A reinforced concrete structure, or a steel reinforced concrete structure, a column of at least one floor or more from the top floor of a building, a part or all of a beam is a steel frame reinforced concrete structure or a steel frame structure, and the steel frame of the column beam is used. It is used as an upper frame, and is used as an installation frame when performing a construction work of a building using an overhead traveling crane or manipulator, and it is gradually raised to the upper part according to the progress of the construction work of the building construction. A method of constructing a building characterized by going. 2. The building construction method according to claim 1, wherein the steel frame member is supported by column rebars, and the upper frame is supported through the column rebars. 3. The building construction method according to claim 1, wherein the steel frame member is moved up and down by using an electric chain block or an electric winch.